What is a unique key?
Long Answer
Views 757
Answer:
A Unique key constraint uniquely identified each record in the database. This provides uniqueness for the column or set of columns.
A Primary key constraint has automatic unique constraint defined on it. But not, in the case of Unique Key.
There can be many unique constraint defined per table, but only one Primary key constraint defined per table.
Related Articles:
This section is dedicated exclusively to Questions & Answers. For an in-depth exploration of SQL, click the links and dive deeper into this subject.
Join Our telegram group to ask Questions
Click below button to join our groups.